The 74HC158D is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). Manufactured by NXP Semiconductors, it is part of the 74HC family, known for its versatility and reliability in a wide range of digital applications. This quad 2-input multiplexer is designed to select four bits of data from two sources under the control of a common data select input. The device features four identical 2-input multiplexers with 3-state outputs that can interface directly with standard 15V digital circuits.

Key Features

• Wide operating voltage range from 2V to 6V
• High noise immunity
• Low power consumption: 20 µA maximum ICC
• Output drive capability: 10 LSTTL loads
• Symmetrical output impedance
• High noise immunity
• Non-inverting 3-state outputs
• Inputs and outputs on opposite sides of package allowing easy interface with microprocessors
• Complies with JEDEC standard no. 7A
• ESD protection:
  • HBM JESD22-A114E exceeds 2000 V
  • MM JESD22-A115-A exceeds 200 V
• Multiple package options

Applications

The 74HC158D is suitable for a variety of applications that require data selection or multiplexing. It is commonly used in digital systems such as:

• Function generators
• Computer systems
• Data routing
• Signal gating
• Control systems

Product Details

The device is provided in a slim SO16 package. Its logic diagram consists of four multiplexers, each with two data inputs (1A0, 1A1, 2A0, etc.), a common data select input (1S, 2S, etc.), and an enable input (1G, 2G, etc.). When the enable input is high, the respective multiplexer's output is in the high-impedance state. The 74HC158D is designed for asynchronous operation, allowing for independent control of data select and enable inputs.